Andrea Schauerhuber Manuel Wimmer Elisabeth Kapsammer Bridging existing Web modeling languages to model-driven engineering: a metamodel for WebML. 5 2006 ICWE Workshops http://doi.acm.org/10.1145/1149993.1149999 conf/icwe/2006w db/conf/icwe/icwe2006w.html#SchauerhuberWK06